Paper-cutter.



PATENTED APR. 23, 1907.

W. H. GOLDING. PAPER CUTTER.

' APPLICATION FILED mm: 11.1906.

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?ATENTED APR. 23, 1907.

W. H. GOLDING.

PAPER CUTTER.

APPLICATION FILED JUNE 11.1906.

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William HGoZding} No. 851,413.- PATBNTED APR. 23. 1907.

W. H. GOLDING. I PAPER CUTTER.

APPLICATION I'I-LED mm: 11,1906.

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M 1 M l. m w mww 8 Gm QH mN Mn 4 m m 3 K W mm i w i @w w kw A. Nh mm mm.Q N mm \g E E S g 4% Q {m aw m mg WILLIAM H. GOLDING, OF FRANKLIN,MASSACHUSETTS.

PAPER-CUTTER.

Specification of Letters Patent.

Patented April 23, 1907.

Application filed June 11, 1906. Serial No. 321,104.

To all whom it 71mg; concern.-

Be it known that 1, WILLIAM H. GOLDING, a citizen of the United States,and a resident of Franklin, in the county of Norfolk and State ofMassachusetts, have invented certain new and useful Improvements inPaper- Cutters, of which the following is a full, clear, and exactdescription.

The object of this invention is the construction of a power-operated,self-clamping paper cutter wherein the clamping pressure shallautomatically increase with the thickness or resistance of the materialbeing cut; and which shall embrace numerous other improvementshereinafter set forth.

Referring to the drawings forming part of this specification, Figure 1is a front elevation of a paper cutter embodying my improvements. Fig. 2is a plan view of the same. Fig. 3 is a sectional detail elevationshowing my device for positioning the material without lowering theclamp or the blade. Fig. 4 is a cross section on the line XX in Fig. 1.Fig. 5 is a cross section on the line YY in Fig. 1. Fig. 6 is a faceview of a portion of the main gear wheel.

The reference numeral 1 designates the table of the paper cutter; 10 thecutter blade, and 30 the clamp. The blade is secured by suitable boltsor screws 1.2 to the blade-can rier 11, the latter being held backagainst, and moved in close contact with, the ways 40, 40 by means ofthe following arrangement the purpose being to do away with thenecessity for guide ways at both front and rear of the blade. Stronglypivoted to the Way 40 at 19 is the swinging arm 18 whose free end isprovided with a pin or bolt 17 reaching forward through the slot 14 inthe blade-carrier into engagement with the block 16. Said block slideshorizontally along the ways 13 above and below said slot, and is securedto, or made integral with, the connecting rod 15 whose opposite end isprovided with a similar block 16 slidable along similar ways 13. Fromthis latter block extends a bolt 17 through a slot 14 to the bell-cranklever 20, which is strongly pivoted to the ways 40 at 21. Said waysbeing slightly farther forward of said arms so that the latter are outof contact with the carrier 1 1, and the carrier being kept pressed backagainst the ways by means of the bolts 17, 17 and the check-nuts 17thereon, there is no necessity for guide ways in front of the bladecarrier. This simplifies the construction of the machine, removing partswhich would otherwise be in the way; and greatly simplifies theadjustment required to take up wear; all that is now needed being toturn the check nuts 17 slightly.

A pitman rod 23 pivoted at 22 to the bellcrank lever and joined to thecrank-pin 24 of the gear wheel 25, serves to swing both the bell-cranklever and the arm 18 downward and to the right each time said wheelmakes a partial turn, and then back to their original positions upon thecompletion of its revolution. As said lever or arm and arm 18 thus swingtogether, through the agency of the connecting rod 15, the carrier andblade are made to descend until the blade-edge reaches the table 1 andjust penetrates the usual wooden strip provided therefor.

To adapt the blade to receive a drawing motion after the clamp reachesthe material to be out, the clamp is supported by-the bar 31 pivotedthereto at 32; while the upper end of said bar is pivoted at 33 to theshoulder 34 rising from the blade-carrier. Hence the clamp rises andfalls with the carrier being restricted to a strictly vertical movementby its guide-ribs 37 sliding in the ways 40, 40; while the carrier iscapable of a longitudinal motion as well.

When, now, the carrier and clamp descend until the clamp reaches thepile of paper to be cut and can hence go no farther, the only way inwhich the carrier can continue to descend is to move toward the righthand side of the machine to a distance determined by the swing of thebar 31 about the bolt 32. The deeper and heavier the out which the bladeis forced to make, and the greater the resistance which it mustovercome, the heavier the pressure which will be applied to the clampthrough the bar 31. Consequently the clamping pressure is automaticallyi11- creased in proportion to the thickness or resistance of thematerial being out.

To make sure that the carrier and clamp shall move together verticallyuntil the material to be cut is reached, a locking device is providedconsisting of the bolt 35 projecting from the elbow 36 and entering ashallow depression in the top edge of the carrier; said elbow beingintegral with the clamp, or otherwise made rigid therewith. Said bolt ispreferably given a resilient pressure against the carrier in order torelieve the shock with which parts come together in their upwardstrokes. Thus locked together, the carrier and clamp descend under theaction of the arms 20, 18 in a vertical path; the blocks 16, 16 slidingalong the ways 13, 13; but when the pile of paper is reached by theclamp, then the carrier sinks and swings out of its engagement with thebolt 35 and continues its journey alone as above described.

For positioning a pile of paper without moving the clamp or carrier downclose thereto, I provide the gage consisting of the rod 50 slidablevertically in a groove in the front face of the clamp, with its frontface flush with the rear of the blade 10. This rod is manipulated by afinger 51 at its upper end, and is normally retained in its elevatedposition by means of a coiled spring 52 surrounding the elongated bolt53 tapped at its lower end into the clamp, and passing through saidfinger. This bolt acts both to support said spring and to bettermaintain the vertical position of the gage rod.

In Figs. 1 and 3, the gage rod is shown depressed, but is normally heldby said spring with its lower end wholly concealed behind the blade. Inuse, it is pressed down until its lower end rests upon, or nearlycontacts with, the pile of paper; its front face revealing the pathalong which the blade will descend in the operation of trimming orcutting the papers.

For causing the machine to automatically stop at the end of a singleoperation of the cutter-blade, the gear wheel 25 is connected by apinion 28 to the shaft 29 on which is loosely mounted the pulley 7 O towhich power is communicated by any suitable means, as a belt. Fixed onsaid shaft are the arms 73 joined by links 72 to the friction shoes 71,which, when strongly pressed into frictional engagement with the innersurface of the pulley-rim, cause the shaft 29 to revolve with saidpulley. To thus operatesaid friction shoes, the clutch member 63 isformed with lugs 64 to which are pivoted the struts 65 pressing at theirouter ends against said shoes. This clutch member is actuated by meansof the arm 62, shaft 61 and hand-lever 60; and is unshpped by theengagement of a projection, as 7 7 on the gear wheel 25 with the lowerend of the arm 62.

To allow for adjustment, the part 75 on the lower part of the arm 62which is engaged by said projection, is a separate piece and joined tothe arm by a bolt 76 penetrating a slot in said part.

It may sometimes happen that the wheel 25 will stop, after beingunclutched as above, with the projection 77 so close to the part or nose75 that the two will contact when the attempt is made to throw theclutch in, and by preventing the arm 62 from being moved, themachine-cannot be started. To remedy this I form the said projection 77not as apparently a pin as indicated in Fig. 1, but a pivoted latchmovable between stops 7 7 b and normally kept in contact with one stopby a tension spring 7 7 Said spring is disposed to normally retain saidlatch into contact with the stop ahead thereof as the wheel revolves.Hence when the latch first meets the nose 75 it is moved back againstthe rear stop, and, thus supported, actuates the clutch mechanism. Theinstant the clutch mechanism is thus actuated, and the latch carriedpast the nose 75 ever so slightly, such latch swings forward against itsforward stop and thus far enough away from said nose as to be incapableof undesired interference there With.

To ensure the immediate stopping of the mechanism when unclutched, Iprovide the clutch member 63 with a cone 68 disposed to enter acorresponding cup 69 rigid with the shaft bearings. The friction betweensaid cup and cone quickly brings the moving parts to rest.

In operating this machine, the pile of paper is first suitablypositioned upon the table 1, using if necessary the gage 50, and thenthe hand lever 60 is raised. This action throws the clutch mechanisminto engagement; the gear wheel 25 turns; the clamp and cutter bladedescend; the clamp stops upon reaching the paper; the blade completesits stroke with a longitudinal swing, cutting the paper; and then theblade returns to the level of the clamp, and both it and the clamp riseto their topmost position, the machine then automatically unclutchingitself and the friction cone bringing the parts to rest.

What I claim as my invention and for which I desire Letters Patent is asfollows, to wit 1. The combination in a paper cutter, of a verticallyslidable clamping member, a vertically and longitudinally slidable bladeand carrier therefor, means for vertically moving the clamping memberand carrier simultaneously, means acting by an obstruction to thefurther descent of the clamping member to add a longitudinal movement tothe carrier during the latters further descent, and a locking deviceholding the carrier and clamping member from relative motion until afterthe clamping member reaches such obstruction.

2. The combination in a paper cutter, of fixed ways, a blade-carrier,means for its operation, a clamping member, and a rod pivoted to boththe carrier and clamping member and disposed to give the carrier alongitudinal motion during the portion of the latters descent followinga cessation of descent on the part of the clamping member.

3. The combination in a paper cutter, of fiXed ways, swinging armspivoted thereto, means for giving equal motion to both said arms, ablade-carrier slidable both vertically and longitudinally, connectionsbetween said arms and carrier slidable in the latter, a

Ways, and means connecting said carrier and clamping member and disposedto give the carrier a longitudinal movement upon a cessation of thedescent of the clamping member. I 4. The combination in a paper cutter,of fixed Ways, swinging arms pivoted thereto, i

clamping member vertically slidable in said I means for giving equalmotion to both said arms, a blade and carrier slidable on said ways,connections between said arms and carrier, a clamping member verticallyslid able in said Ways, a projection rising "from said carrier, a linkor rod pivoted to said projection and to said claniping member, at anoblique angle, and a lock normally retaining said carrier and clampingmember against relative motion.

5. The combination in a paper cutter, of a blade-carrier, fixed wayscontacting with the rear face of said carrier, swinging arms piv-, otedto said Ways, a connecting rod terminally pivoted to said arms,said rodbeing provided With terminal blocks slidable along ways formed on thefront face of the carrier, and

the pivotal connections between said rod and arms being extended throughslots formed in said carrier between the lastnamed ways,and means forswinging one of said arms and thereby operating said carrier and blade.

6. The combination in a paper cutter, of a blade carrier, fixed Wayscontacting With the rear face of said carrier, swinging arms pivoted tosaid ways, pivot bolts held by said arms and extending forward throughsaid carrier, nuts on said bolts for applying a pressure to the carrierand retaining it in contact with said ways, and means for simultaneouslyswinging said arms whereby front ways for said carrier are renderedunnecessary.

In testimony that I claim the foregoing invention, I have hereunto setmy hand this fifth day of June, 1906.

WILLIAM H. GOLDING.

Vitnesses:

Tiios. L. N UTTER, A. B. UPIIAM.

